Abstract
We analyze different decoherence processes in a system coupled to a bath. Apart from the well known standard dephasing mechanism which is temperature dependent an alternative mechanism is presented, the spin-swap dephasing which does not need initial bath activation and is temperature independent. We show that for dipole interaction in the weak coupling regime the separation of time scales between system and bath can not produce pure dephasing, the process being accompanied by dissipation. Activated and non-activated dephasing processes are analyzed in a diamond nitrogen-vacancy center.
Original language | English |
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Article number | 093001 |
Journal | New Journal of Physics |
Volume | 18 |
Issue number | 9 |
DOIs | |
State | Published - Sep 2016 |
Bibliographical note
Publisher Copyright:© 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Keywords
- decoherence
- dephasing
- open quantum systems